I have almost gotten GPRS modem support to work. At least as far as seeing AT commands from it. Still need to get the correct RIL for the modem but progress has been made to show a phone and SMS messaging etc. I'll post this on my blog later when the final system works.

I have an issue with policies and get the following output on the debug port. There are no AT commands in the logcat for radio.

I've noticed that the Samsung rild.te fileI found online for 5.1 has tmpfs settings and I have tried these and still get avc denied.

Even tried to set chown on ttyUSB2 as radio:radio and still nothing.

If i could get the right policy to work I should be able to get the modem working. Just now I still get errors in the AT commands but that is possible to fix as I am only using the referenceril for the time being.